<template>
  <div>
    <!--面包屑导航区域-->
    <el-breadcrumb separator='/'>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图-->
    <el-card>
      <!--搜索与添加区域-->
      <el-row :gutter='20'>
        <el-col :span='8'>
          <el-input placeholder='请输入内容' v-model='queryInfo.query' clearable @clear='getUserList'>
            <el-button slot='append' icon='el-icon-search' @click='getUserList'></el-button>
          </el-input>
        </el-col>
        <el-col :span='4'>
          <el-button type='primary' @click='addDialogVisible = true'>添加用户</el-button>
        </el-col>
      </el-row>
      <!--用户列表区域-->
      <el-table :data='userlist' border stripe>
        <el-table-column type='index' label='#' align='center'></el-table-column>
        <el-table-column label='姓名' prop='username'></el-table-column>
        <el-table-column label='邮箱' prop='email'></el-table-column>
        <el-table-column label='电话' prop='mobile'></el-table-column>
        <el-table-column label='角色' prop='role_name'></el-table-column>
        <el-table-column label='状态'>
          <template slot-scope='scope'>
            <el-switch v-model='scope.row.mg_state' @change='userStateChanged(scope.row)'></el-switch>
          </template>
        </el-table-column>
        <el-table-column label='操作' width='180px'>
          <template slot-scope='scope'>
            <!--修改按钮-->
            <el-button type='primary' icon='el-icon-edit' size='mini' @click='showEditDialog(scope.row.id)'></el-button>
            <!--删除按钮-->
            <el-button type='danger' icon='el-icon-delete' size='mini'
                       @click='removeUserById(scope.row.id)'></el-button>
            <!--分配角色按钮-->
            <el-tooltip effect='dark' content='分配角色' placement='top' :enterable='false'>
              <el-button type='warning' icon='el-icon-setting' size='mini' @click='setRole(scope.row)'></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!--分页区域-->
      <el-pagination
        @size-change='handleSizeChange'
        @current-change='handleCurrentChange'
        :current-page='queryInfo.pagenum'
        :page-sizes='[1, 2, 5, 10]'
        :page-size='queryInfo.pagesize'
        layout='total, sizes, prev, pager, next, jumper'
        :total='total'>
      </el-pagination>
    </el-card>
    <!--添加用户的对话框-->
    <el-dialog
      title='添加用户'
      :visible.sync='addDialogVisible'
      width='50%'
      @close='addDialogClosed'>
      <!--内容主体区-->
      <el-form :model='addForm' :rules='addFormRules' ref='addFormRef' label-width='70px'>
        <el-form-item label='用户名' prop='username'>
          <el-input v-model='addForm.username'></el-input>
        </el-form-item>
        <el-form-item label='密码' prop='password'>
          <el-input v-model='addForm.password'></el-input>
        </el-form-item>
        <el-form-item label='邮箱' prop='email'>
          <el-input v-model='addForm.email'></el-input>
        </el-form-item>
        <el-form-item label='手机' prop='mobile'>
          <el-input v-model='addForm.mobile'></el-input>
        </el-form-item>
      </el-form>
      <!--底部区-->
      <span slot='footer' class='dialog-footer'>
        <el-button @click='addDialogVisible = false'>取 消</el-button>
        <el-button type='primary' @click='addUser'>确 定</el-button>
      </span>
    </el-dialog>
    <!--修改用户的对话框-->
    <el-dialog
      title='修改用户'
      :visible.sync='editDialogVisible'
      width='50%'
      @close='editDialogClosed'>
      <el-form :model='editForm' :rules='editFormRules' ref='editFormRef' label-width='70px'>
        <el-form-item label='用户名'>
          <el-input v-model='editForm.username' disabled></el-input>
        </el-form-item>
        <el-form-item label='邮箱' prop='email'>
          <el-input v-model='editForm.email'></el-input>
        </el-form-item>
        <el-form-item label='手机' prop='mobile'>
          <el-input v-model='editForm.mobile'></el-input>
        </el-form-item>
      </el-form>
      <span slot='footer' class='dialog-footer'>
        <el-button @click='editDialogVisible = false'>取 消</el-button>
        <el-button type='primary' @click='editUserInfo'>确 定</el-button>
      </span>
    </el-dialog>
    <!--分配角色的对话框-->
    <el-dialog
      title='分配角色'
      :visible.sync='setRoleDialogVisible'
      width='50%'
      @close='setRoleDialogClosed'>
      <p>当前的用户：{{userInfo.username}}</p>
      <p>当前的角色：{{userInfo.role_name}}</p>
      <p>分配新角色： <el-select v-model="selectedRoleId" placeholder="请选择">
        <el-option
          v-for="item in rolesList"
          :key="item.id"
          :label="item.roleName"
          :value="item.id">
        </el-option>
      </el-select></p>
      <span slot='footer' class='dialog-footer'>
        <el-button @click='setRoleDialogVisible = false'>取 消</el-button>
        <el-button type='primary' @click='saveRoleInfo'>确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    // 验证邮箱的规则
    var checkEmail = (rule, value, cb) => {
      // 验证邮箱的正则表达式
      const regEmail = /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/
      if (regEmail.test(value)) {
        // 合法的邮箱
        return cb()
      }
      cb(new Error('请输入合法的邮箱'))
    }

    // 验证手机号的规则
    var checkMobile = (rule, value, cb) => {
      const regMobile = /^(13[0-9]|14[01456879]|15[0-35-9]|16[2567]|17[0-8]|18[0-9]|19[0-35-9])\d{8}$/
      if (regMobile.test(value)) {
        return cb()
      }
      cb(new Error('请输入合法的手机号'))
    }

    return {
      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        // 当前的页数
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 2
      },
      userlist: [],
      total: 0,
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        username: [
          {
            required: true,
            message: '请输入用户名',
            trigger: 'blur'
          }, {
            min: 3,
            max: 10,
            message: '用户名的长度再3~10个字符之间',
            trigger: 'blur'
          }
        ],
        password: [
          {
            required: true,
            message: '请输入密码',
            trigger: 'blur'
          }, {
            min: 6,
            max: 15,
            message: '密码的长度再6~15个字符之间',
            trigger: 'blur'
          }
        ],
        email: [
          {
            required: true,
            message: '请输入邮箱',
            trigger: 'blur'
          },
          {
            validator: checkEmail,
            trigger: 'blur'
          }
        ],
        mobile: [
          {
            required: true,
            message: '请输入手机',
            trigger: 'blur'
          },
          {
            validator: checkMobile,
            trigger: 'blur'
          }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        email: [
          {
            required: true,
            message: '请输入邮箱',
            trigger: 'blur'
          },
          {
            validator: checkEmail,
            trigger: 'blur'
          }
        ],
        mobile: [
          {
            required: true,
            message: '请输入手机',
            trigger: 'blur'
          },
          {
            validator: checkMobile,
            trigger: 'blur'
          }
        ]
      },
      // 控制分配角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo: {},
      // 所有角色的数据列表
      rolesList: [],
      // 已选中的角色id值
      selectedRoleId: ''
    }
  },
  // 生命周期函数
  created () {
    this.getUserList()
  },
  methods: {
    // 优化异步操作
    async getUserList () {
      // 使用await得到一个数据对象，可以解构复制出一个data属性，重命名为res
      const { data: res } = await this.$http.get('users', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户列表失败！')
      }
      this.userlist = res.data.users
      this.total = res.data.total
      console.log(res)
    },
    // 监听 pageSize 改变的事件
    handleSizeChange (newSize) {
      console.log(newSize)
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 监听页码值改变的事件
    handleCurrentChange (newPage) {
      console.log(newPage)
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },
    // 监听 switch 开关状态的改变
    async userStateChanged (userinfo) {
      console.log(userinfo)
      const { data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
      if (res.meta.status !== 200) {
        userinfo.mg_state = !userinfo.mg_state
        return this.$message.error('更新用户状态失败！')
      }
      this.$message.success('更新用户状态成功！')
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed () {
      this.$refs.addFormRef.resetFields()
    },
    // 点击按钮，添加新用户
    addUser () {
      this.$refs.addFormRef.validate(async valid => {
        // 数据校验
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('users', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败')
        }
        this.$message.success('添加用户成功')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getUserList()
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog (id) {
      const { data: res } = await this.$http.get('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed () {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editUserInfo () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户信息的数据请求
        const { data: res } = await this.$http.put('users/' + this.editForm.id, {
          email: this.editForm.email,
          mobile: this.editForm.mobile
        })
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户信息失败')
        }
        this.$message.success('更新用户信息成功')
        this.editDialogVisible = false
        this.getUserList()
      })
    },
    // 根据ID删除对应的用户信息
    async removeUserById (id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败')
      }
      this.$message.success('删除用户成功')
      this.getUserList()
    },
    async setRole (userinfo) {
      this.userInfo = userinfo
      this.setRoleDialogVisible = true
      // 在展示对话框之前，获取所有的列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },
    // 点击按钮分配角色
    async saveRoleInfo () {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择要分配的角色')
      }
      const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, {
        rid: this.selectedRoleId
      })
      if (res.meta.status !== 200) {
        return this.$message.error('分配用户角色失败')
      }
      this.$message.success('分配用户角色成功')
      this.setRoleDialogVisible = false
      this.getUserList()
    },
    setRoleDialogClosed () {
      this.selectedRoleId = ''
      this.userInfo = {}
    }
  }
}
</script>

<style lang='less' scoped>

</style>
